diff --git a/doc/conf.py b/doc/conf.py
index 6052f99eb..5d66ef236 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -52,7 +52,7 @@ templates_path = ['_templates']
 # The suffix(es) of source filenames.
 # You can specify multiple suffix as a list of string:
 # source_suffix = ['.rst', '.md']
-source_suffix = ['.rst', '.md']
+source_suffix = ['.rst']
 
 # The encoding of source files.
 #source_encoding = 'utf-8-sig'
diff --git a/doc/cpp_api.rst b/doc/cpp_api.rst
index ecd721b39..6b4ba8936 100644
--- a/doc/cpp_api.rst
+++ b/doc/cpp_api.rst
@@ -1,5 +1,5 @@
 C++ Library API of Rabit
-====================
+========================
 This page contains document of Library API of rabit.
 
 .. toctree::
diff --git a/doc/python-requirements.txt b/doc/python-requirements.txt
new file mode 100644
index 000000000..42d8ea92c
--- /dev/null
+++ b/doc/python-requirements.txt
@@ -0,0 +1,2 @@
+numpy==1.8.1
+